The new fault data base allows a more detailed overview of the faults
that are reported. In Table 2 the number of faults and total time lost
as a function of the system and kind of fault is presented.

Table 2:
Down time statistics for period 27

Syst/Type

Soft

Elec

Optics

Mech

Others

Total

Telescope

14

01:30

5

04:12

2

03:00

2

00:00

1

00:15

24

08:57

Building

0

4

18:00

0

6

00:40

2

05:30

12

24:10

Computers

13

01:00

6

01:00

2

00:00

1

00:00

2

00:00

24

02:00

ALFOSC

6

00:45

4

00:50

1

00:00

4

00:50

0

15

02:25

MOSCA

1

00:00

0

0

0

1

00:40

2

00:40

NOTCam

6

00:25

5

03:35

0

6

06:15

0

17

10:15

StanCam

6

02:15

0

0

4

00:00

1

00:00

11

02:15

Others

0

0

0

1

00:00

1

00:00

2

00:00

Total

46

05:55

24

27:37

5

03:00

24

07:45

8

06:25

107

50:42

For each system-type category the total number of faults and total time lost are given

One thing that one can see from Table 2 is that the relative limited
categories both in system and type do provide a proper frame work to
classify the large majority of faults. The simplicity of this system
makes it also much easier to search the data base and allows us to
draw more general conclusions about the problems. A straightforward
conclusion from the information in Table 2 is that the main problems
we have are with the electronics of the building.